This function can be performed with the operator in the control center via CRTs and typewriters.

这个功能可以通过几台彩色屏幕显示器和打印机与控制中心操作人员联系来实现.

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CRTs displayvideo display terminals, and as an output light source in third - generation phototypesetters.

显像终端机多用阴极射线管;第三世代的照相排字机也用它作输出光源.

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